1// SPDX-License-Identifier: GPL-2.0+ 2/* 3 * Copyright (C) 2016 Oracle. All Rights Reserved. 4 * Author: Darrick J. Wong <darrick.wong@oracle.com> 5 */ 6#ifndef __XFS_RMAP_H__ 7#define __XFS_RMAP_H__ 8 9static inline void 10xfs_rmap_ino_bmbt_owner( 11 struct xfs_owner_info *oi, 12 xfs_ino_t ino, 13 int whichfork) 14{ 15 oi->oi_owner = ino; 16 oi->oi_offset = 0; 17 oi->oi_flags = XFS_OWNER_INFO_BMBT_BLOCK; 18 if (whichfork == XFS_ATTR_FORK) 19 oi->oi_flags |= XFS_OWNER_INFO_ATTR_FORK; 20} 21 22static inline void 23xfs_rmap_ino_owner( 24 struct xfs_owner_info *oi, 25 xfs_ino_t ino, 26 int whichfork, 27 xfs_fileoff_t offset) 28{ 29 oi->oi_owner = ino; 30 oi->oi_offset = offset; 31 oi->oi_flags = 0; 32 if (whichfork == XFS_ATTR_FORK) 33 oi->oi_flags |= XFS_OWNER_INFO_ATTR_FORK; 34} 35 36static inline bool 37xfs_rmap_should_skip_owner_update( 38 const struct xfs_owner_info *oi) 39{ 40 return oi->oi_owner == XFS_RMAP_OWN_NULL; 41} 42 43/* Reverse mapping functions. */ 44 45struct xfs_buf; 46 47static inline __u64 48xfs_rmap_irec_offset_pack( 49 const struct xfs_rmap_irec *irec) 50{ 51 __u64 x; 52 53 x = XFS_RMAP_OFF(irec->rm_offset); 54 if (irec->rm_flags & XFS_RMAP_ATTR_FORK) 55 x |= XFS_RMAP_OFF_ATTR_FORK; 56 if (irec->rm_flags & XFS_RMAP_BMBT_BLOCK) 57 x |= XFS_RMAP_OFF_BMBT_BLOCK; 58 if (irec->rm_flags & XFS_RMAP_UNWRITTEN) 59 x |= XFS_RMAP_OFF_UNWRITTEN; 60 return x; 61} 62 63static inline int 64xfs_rmap_irec_offset_unpack( 65 __u64 offset, 66 struct xfs_rmap_irec *irec) 67{ 68 if (offset & ~(XFS_RMAP_OFF_MASK | XFS_RMAP_OFF_FLAGS)) 69 return -EFSCORRUPTED; 70 irec->rm_offset = XFS_RMAP_OFF(offset); 71 irec->rm_flags = 0; 72 if (offset & XFS_RMAP_OFF_ATTR_FORK) 73 irec->rm_flags |= XFS_RMAP_ATTR_FORK; 74 if (offset & XFS_RMAP_OFF_BMBT_BLOCK) 75 irec->rm_flags |= XFS_RMAP_BMBT_BLOCK; 76 if (offset & XFS_RMAP_OFF_UNWRITTEN) 77 irec->rm_flags |= XFS_RMAP_UNWRITTEN; 78 return 0; 79} 80 81static inline void 82xfs_owner_info_unpack( 83 const struct xfs_owner_info *oinfo, 84 uint64_t *owner, 85 uint64_t *offset, 86 unsigned int *flags) 87{ 88 unsigned int r = 0; 89 90 *owner = oinfo->oi_owner; 91 *offset = oinfo->oi_offset; 92 if (oinfo->oi_flags & XFS_OWNER_INFO_ATTR_FORK) 93 r |= XFS_RMAP_ATTR_FORK; 94 if (oinfo->oi_flags & XFS_OWNER_INFO_BMBT_BLOCK) 95 r |= XFS_RMAP_BMBT_BLOCK; 96 *flags = r; 97} 98 99static inline void 100xfs_owner_info_pack( 101 struct xfs_owner_info *oinfo, 102 uint64_t owner, 103 uint64_t offset, 104 unsigned int flags) 105{ 106 oinfo->oi_owner = owner; 107 oinfo->oi_offset = XFS_RMAP_OFF(offset); 108 oinfo->oi_flags = 0; 109 if (flags & XFS_RMAP_ATTR_FORK) 110 oinfo->oi_flags |= XFS_OWNER_INFO_ATTR_FORK; 111 if (flags & XFS_RMAP_BMBT_BLOCK) 112 oinfo->oi_flags |= XFS_OWNER_INFO_BMBT_BLOCK; 113} 114 115int xfs_rmap_alloc(struct xfs_trans *tp, struct xfs_buf *agbp, 116 xfs_agnumber_t agno, xfs_agblock_t bno, xfs_extlen_t len, 117 const struct xfs_owner_info *oinfo); 118int xfs_rmap_free(struct xfs_trans *tp, struct xfs_buf *agbp, 119 xfs_agnumber_t agno, xfs_agblock_t bno, xfs_extlen_t len, 120 const struct xfs_owner_info *oinfo); 121 122int xfs_rmap_lookup_le(struct xfs_btree_cur *cur, xfs_agblock_t bno, 123 xfs_extlen_t len, uint64_t owner, uint64_t offset, 124 unsigned int flags, int *stat); 125int xfs_rmap_lookup_eq(struct xfs_btree_cur *cur, xfs_agblock_t bno, 126 xfs_extlen_t len, uint64_t owner, uint64_t offset, 127 unsigned int flags, int *stat); 128int xfs_rmap_insert(struct xfs_btree_cur *rcur, xfs_agblock_t agbno, 129 xfs_extlen_t len, uint64_t owner, uint64_t offset, 130 unsigned int flags); 131int xfs_rmap_get_rec(struct xfs_btree_cur *cur, struct xfs_rmap_irec *irec, 132 int *stat); 133 134typedef int (*xfs_rmap_query_range_fn)( 135 struct xfs_btree_cur *cur, 136 struct xfs_rmap_irec *rec, 137 void *priv); 138 139int xfs_rmap_query_range(struct xfs_btree_cur *cur, 140 struct xfs_rmap_irec *low_rec, struct xfs_rmap_irec *high_rec, 141 xfs_rmap_query_range_fn fn, void *priv); 142int xfs_rmap_query_all(struct xfs_btree_cur *cur, xfs_rmap_query_range_fn fn, 143 void *priv); 144 145enum xfs_rmap_intent_type { 146 XFS_RMAP_MAP, 147 XFS_RMAP_MAP_SHARED, 148 XFS_RMAP_UNMAP, 149 XFS_RMAP_UNMAP_SHARED, 150 XFS_RMAP_CONVERT, 151 XFS_RMAP_CONVERT_SHARED, 152 XFS_RMAP_ALLOC, 153 XFS_RMAP_FREE, 154}; 155 156struct xfs_rmap_intent { 157 struct list_head ri_list; 158 enum xfs_rmap_intent_type ri_type; 159 uint64_t ri_owner; 160 int ri_whichfork; 161 struct xfs_bmbt_irec ri_bmap; 162}; 163 164/* functions for updating the rmapbt based on bmbt map/unmap operations */ 165void xfs_rmap_map_extent(struct xfs_trans *tp, struct xfs_inode *ip, 166 int whichfork, struct xfs_bmbt_irec *imap); 167void xfs_rmap_unmap_extent(struct xfs_trans *tp, struct xfs_inode *ip, 168 int whichfork, struct xfs_bmbt_irec *imap); 169void xfs_rmap_convert_extent(struct xfs_mount *mp, struct xfs_trans *tp, 170 struct xfs_inode *ip, int whichfork, 171 struct xfs_bmbt_irec *imap); 172void xfs_rmap_alloc_extent(struct xfs_trans *tp, xfs_agnumber_t agno, 173 xfs_agblock_t bno, xfs_extlen_t len, uint64_t owner); 174void xfs_rmap_free_extent(struct xfs_trans *tp, xfs_agnumber_t agno, 175 xfs_agblock_t bno, xfs_extlen_t len, uint64_t owner); 176 177void xfs_rmap_finish_one_cleanup(struct xfs_trans *tp, 178 struct xfs_btree_cur *rcur, int error); 179int xfs_rmap_finish_one(struct xfs_trans *tp, enum xfs_rmap_intent_type type, 180 uint64_t owner, int whichfork, xfs_fileoff_t startoff, 181 xfs_fsblock_t startblock, xfs_filblks_t blockcount, 182 xfs_exntst_t state, struct xfs_btree_cur **pcur); 183 184int xfs_rmap_find_left_neighbor(struct xfs_btree_cur *cur, xfs_agblock_t bno, 185 uint64_t owner, uint64_t offset, unsigned int flags, 186 struct xfs_rmap_irec *irec, int *stat); 187int xfs_rmap_lookup_le_range(struct xfs_btree_cur *cur, xfs_agblock_t bno, 188 uint64_t owner, uint64_t offset, unsigned int flags, 189 struct xfs_rmap_irec *irec, int *stat); 190int xfs_rmap_compare(const struct xfs_rmap_irec *a, 191 const struct xfs_rmap_irec *b); 192union xfs_btree_rec; 193int xfs_rmap_btrec_to_irec(union xfs_btree_rec *rec, 194 struct xfs_rmap_irec *irec); 195int xfs_rmap_has_record(struct xfs_btree_cur *cur, xfs_agblock_t bno, 196 xfs_extlen_t len, bool *exists); 197int xfs_rmap_record_exists(struct xfs_btree_cur *cur, xfs_agblock_t bno, 198 xfs_extlen_t len, const struct xfs_owner_info *oinfo, 199 bool *has_rmap); 200int xfs_rmap_has_other_keys(struct xfs_btree_cur *cur, xfs_agblock_t bno, 201 xfs_extlen_t len, const struct xfs_owner_info *oinfo, 202 bool *has_rmap); 203int xfs_rmap_map_raw(struct xfs_btree_cur *cur, struct xfs_rmap_irec *rmap); 204 205extern const struct xfs_owner_info XFS_RMAP_OINFO_SKIP_UPDATE; 206extern const struct xfs_owner_info XFS_RMAP_OINFO_ANY_OWNER; 207extern const struct xfs_owner_info XFS_RMAP_OINFO_FS; 208extern const struct xfs_owner_info XFS_RMAP_OINFO_LOG; 209extern const struct xfs_owner_info XFS_RMAP_OINFO_AG; 210extern const struct xfs_owner_info XFS_RMAP_OINFO_INOBT; 211extern const struct xfs_owner_info XFS_RMAP_OINFO_INODES; 212extern const struct xfs_owner_info XFS_RMAP_OINFO_REFC; 213extern const struct xfs_owner_info XFS_RMAP_OINFO_COW; 214 215#endif /* __XFS_RMAP_H__ */ 216